Futurebiotics White Kidney Bean Extract provides pure phaseolus vulgaris extract in each easy-to-swallow capsule. Each serving provides 1000mg of naturally stimulant-free extract. White Kidney Bean Extract is referred to as a carbohydrate or starch blocker. The benefit of white kidney bean extract is that it may delay digestion and absorption of carbohydrates by blocking the enzyme, alpha amylase. As a result, it may lower the glycemic index of foods.*